Paper-pulp-digester strainer



Dec; 2, 1924.

' c. JENTz PAPER PULP DIGESTER STRAINER Filed April 30 1925 Patented Der. 2, 11921111.

UNITED EFCE.

APER-PULP-DIGESTER STBAINER.

Application led April 30, 1923.

To all whom t may concern.'

Be it known that l. CARL Jnrwrz, a citizen ot the United States of America, and a resident ot Cap de la llzladeleine, county oli (.lhamplain, Province of Quebec, Canada, have invented certain new and usetul lmprovements in Paper-Pulp-Digcster Strainers, oit which the following` is a 'liull and clear specification.

rllhe object of this invention is to provide a simple` strainer apparatus which may be easily kept clean and which will be ei'ifective in holding back thestock 'trom going out with the liquid and grasos. more 'tullfx7 hereinafter set 'torth.

lfn the drawingannexed- Fig'. l is a sectional view oli the top part ot a d igester with my invention applied thereto;

Fig. 2 is a vertical section on the line 2-2 ot Fig'. l.

Referring to the drawing annexed by reference-characters, 5 designates a strainerpipe extendingu across the neck of the digester, at a point immediately under the usual removable cover-plate 6, this pipe being; supported on brackets 7 bolted or otherwise attached to the interior or' the digcsterneck, these brackets being curved to conform to the cylindrical shape oli the ends or' the pipe. This pipe is divided midway its lei'lg'th by an imper'liorate partition d, thereby 'termine' two distinct straining' chambers, the end-walls ot the tube being closed. 0n each half ot the strainer-tube, there provided an upstanding nipple 9 adapted to receive a depending' outlet-tube l0 supported on and extending' through the cover. Each oi' these outlet-tubes l() is connected to a discharge-pipe il and in each dischargepipe is placed a valve l2. The dischargepipes empty into a common pipe i3. The strainer-tube is provided with numerous per'torations to enable the tube to function as a strainer. The nipples 9 may also be perforated.

In operation, one ol the valves l2 will always be closed and the other open, thus permitting;` only one of the strainers to operate at a time. After this one strainer has operated for a suitable length ot time, the valve thereof is closed and the other valve is opened, thus putting the other strainer into operation. In this way, one of the strainers will at all` times be free to clear Serial No. 635,819.

itself of accumulated pulp which tends to clog its perforations, so that at all times during,` the cooking operation the function oiE straining will be maintained at a high degree of emciency.

It will be observed also that when the coverplate is removed, the discharge-tubes l0 slip out of the nipples 9, thus leaving' the strainer in position to be easily removed for cleaning'. t will be observed also that l support the straineretube on the digester and not on the cover, where it will be practicalhv impossible for the sti'aineitulne to become detached and. fall into the cooking' pulp and thus interfere with the blowotl operation in dischargingthe digester. As a matter of tact, even tho the strainer-tube should by accident `tall` into the cookingpulp, its shape is such that it would not interfere with the blowoi' of the cooked pulp; its shape is such that it may be readily withdrawn through the blowoiltr discharge-passage after the blowotl.g is completed, or hooked out from the top.

What I claim as new is:

l. ln combination with a paper-pulp-di- `g'es'ter and its cover. a pair of outlet-pipes extending through the cover and each provided with a valve, and` a hollow perforated. strainer divided by an imperforate partition to make two strainer-chambers. each strainer-chamber being); connected to one oil the aforesaid discharge-tubes.

2. In combination with a paper-pnlp-direster and its cover, a perforated strainertuloe supported on the digester below the cover and having' a central imperiiorate partition to thereby make two strainer-chambers and also provided with upstandingr nipples7 and discharge-pipes extending down through the cover and entering' said nipples each ot said dischargepipes being' provided with a valve.

3. ln combination with a digester and its removable cover, the cover being' provided with a valved discharge-pipe, a strainerchamber removably supported within the neck ot the digester upon the walls thereof, said strainer-chamber having; an upstanding tube which has a telescopic connection with the discharge-tube on the cover.

In testimony whereof li hereunto aiiix my signature. i

CAR-L J ENTZ. 

